Four-cylinder, four-cycle cam and lever radial motor



D. PERLMAN Sept. 30, 1930.

FOUR-CYLINDER, FOUR-CYCLE CAM AND LEVER RADIAL MOTOR Filed April 29,1929 pay id Per Zmai LIttornel S.

Fatented Sept. 30, law

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DAVID IEBLMAN, OF NEW ORLEANS, LOUISIANA.

FOUR-CYLINDER, FOUR-CYCLE CAM AND LEVER RADIAL MOTOR Application filedApril 29,

The present invention relates to improvements in mechanical movements,and more particularly refers to a mechanical movement applied to aninternal combustion or other engine.

An object of the invention is to provide an engine of light weight,great power, low speed crank shaft and producing great leverage andpower.

WVith the foregoing and other objects in view, the invention will bemore fully described hereinafter, and will be more particularly pointedout in the claims appended hereto.

In the drawings, wherein like symbolswrefer. to like or correspondingparts throughout the several views,

The figure is a plan view of an engine constructed according to thepresent invention.

Referring more particularly to the drawings, 1 designates the drive ormain shaft,

' which is journalled in bearings 2 of any appropriate character.

The valve cam disk is indicated at 3, having thereon the intake cams 4and the exhaust cams 5.

A circular'cam or cam wheel 6 is also made fast on the shaft 1. On thiscam disk 6 are cams 7 engaged by rollers 9 carried upon the intermediateparts of levers 8. Pins 10 connect the rollers 9 to the levers 8. Links11 connect-the intermediate portions of adjacent levers 8 together, thepins 10 being utilized .for. connecting the links to the levers. Pistonrods or other rods 13 are coupled to the levers 8 at one end, as by thepins 12. Other pins Mat the opposite ends of the levers 8 'ivotallysecure the levers 8 to-ribs 16 extending inwardly from the housing 15.The connecting rods 13 are, of course,.coupled to the pistons whichoperate in the cylinders, ders being conventionally shown.

In operation, the explosions occur in the engine cylinder in the usualmanner, and

through the connecting rods 13, levers 8 and rollers '9 reacting on thecams 7, the cam disk 6 and the shaft 1 are thus made to rotate. Thesmall cams 4 and 5 are also rotated to operate the valve assembly in awellthe pistons and the cylin- 1929. Serial No. 359,135.

known manner. The links 11 connect the rollers of adjacent levers andkeep the rollers continuously riding the cam disk.

The improved device eliminates the necessity of-valve timing gears, andcreates three working strokes per cylinder per revolution. By means ofthe lever principle, the pressure exerted by the piston thrust throughthe center of the lever on the cam disk, by means of the roller, to thedrive shaft is increased approximately fifty per cent or more. Also dueto this cam and lever arran ement, the hammering effect of the pistonthrust is reduced. The firing order being in rotation, considerablevibration iselimmated. As a resultof the increased number of powerimpulses in one revolution upon the drive shaft, the drive shaft speedalso is greatly reduced. The motor will have more impulses and powerthan any four cylinder motor of ra- 7 dial design having equal cylinderdimensions and specifications. The ribs 16, being integral with thehousing, tend to strengthen the same. The weight per horse power is alsogreatly reduced.

Having thus described the invention, what is claimed is:

1. In a mechanical movement, cylinders radially arranged, pistonstherein, levers having one end secured to fixed fulcrums, so and theother end coupled to the pistons, a main shaft, a cam wheel fixed tosaid main shaft and acted on by the intermediate portions of the levers,and links for connecting the intermediate portions. of the leverstogether. 7

2. In a mechanical movement, a rotary element, a reciprocating element,a connecting rod pivoted at one end to the reciprocat- 7 ing element, alever pivoted at one end to the other end of the connecting rod, saidlever having a fixed fulcrum'at its opposite end, a roller offset towardthe rotary element from the intermediate part of the lever, and acircular cam fixed to the rotary ele- 9 ment and havin rounded pocketsof a size to receive the roIler and convex high points between thepockets also to engage said roller. DAVID PERLMAN.

